This is a nodejs utility that you can flash your ARM based g2 boards with.

The easiest way to install NodeJs on OSX is to use the node version manager. Use this one-liner at the command line to install nvm:
curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.33.4/install.sh | bash

After nvm is installed type:\ `nvm install 6`
This will install node version 6.

Next we use git to download node-sam-ba like the screen shot below:
git clone https://github.com/synthetos/node-sam-ba.git

Installing is pretty simple. Change to the node-sam-ba directory and then issue the npm command to download and install all needed dependencies.
Type: cd node-sam-ba
npm install

To use the node-sam-ba programming utility you need to make sure your USB cable is hooked to your g2core board and that the board is in bootloader mode. IE: No heart beats blinking. See entering bootloader mode for more details on this.
You can now type: node flash.js to get the command usage.

You will notice that you must provide a port (-p option) to specify which serial port the g2core board is identified in your computer. If you do not see a port make sure that your board is hooked up and is in bootloader mode.

My command looked something like this: node flash.js -p /dev/tty.usbmodem146231 -b ~/Documents/GitHub/g2/g2core/bin/Ultimaker2Plus-gquintic-c/g2core.bin

INCOMPLETE: Attach Video and screen shot. -ril3y